Théorie de l'ionisation des atomes en champ laser intense PDF Download

Author: Joseph Wassaf
Publisher:
ISBN:
Category :
Languages : fr
Pages : 137

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Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 800

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Author: A. L'Huillier
Publisher: Springer Science & Business Media
ISBN: 1461579635
Category : Science
Languages : en
Pages : 494

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The rapid development of powerful pulsed lasers is at the origin of a conside rable interest in studying the response of an atom, a molecule (or a solid) to a strong electromagnetic field. It is now possible to produce at the laboratory scale, ultra-short 13 pulses with a duration of 100 femtoseconds (10- second) and a power of the order 12 of 1 terawatt (10 Watt). Under these conditions, very high peak intensities may be obtained and electric fields exceeding typical electron binding fields in atoms are generated. The interaction of an atom or a molecule with such electromagnetic fields has a highly non-linear character which leads to unexpected phenomena. Amongst them, - above-threshold ionization (ATI) i.e. the absorption of additional photons in excess of the minimal number necessary to overcome the ionization potential and its molecular counterpart, above-threshold dissociation (ATD); - generation of very high harmonics of the driving field; - stabilization of one-electron systems in strong fields. These processes were the main topics of two international meetings which were held in 1989 and 1991 in the United States under the common name SILAP (Super-Intense Laser-Atom Physics).

Author: Attila Tóth
Publisher:
ISBN:
Category :
Languages : en
Pages : 298

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Category : Dissertations, Academic
Languages : en
Pages : 760

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Author: JOSE.. LAVANCIER
Publisher:
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Category :
Languages : fr
Pages :

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CETTE THESE EST CONSACREE A L'ETUDE EXPERIMENTALE DES INTERACTIONS ENTRE LES MOLECULES DIATOMIQUES ET LE RAYONNEMENT LASER INTENSE. L'ACCENT EST MIS SUR L'INFLUENCE DES PARAMETRES QUI CARACTERISENT LES IMPULSIONS LASER. POUR CELA, LES EXPERIENCES SONT EFFECTUEES DANS UNE LARGE GAMME D'ECLAIREMENT ET POUR DIFFERENTES LONGUEURS D'ONDE ET DUREES D'IMPULSIONS. L'INTERACTION PRODUIT UNE GRANDE VARIETE D'IONS ATOMIQUES ET MOLECULAIRES DONT L'ORIGINE EST DETERMINEE PAR L'ANALYSE DETAILLEE DES SPECTRES DE MASSE. A FORT ECLAIREMENT, ON OBSERVE DEUX MECANISMES D'EXCITATION QUI DEPENDENT DE LA MOLECULE ET DE LA LONGUEUR D'ONDE: 1) SOIT L'INTERACTION NE PEUPLE QUE DES ETATS EXCITES DE L'ION DOUBLEMENT CHARGE, CE PROCESSUS S'EFFECTUANT SANS MODIFICATION DE LA DISTANCE INTERNUCLEAIRE; 2) SOIT LA MOLECULE PERD CINQ ELECTRONS ET PEUT SE DISSOCIER SELON DIVERS CANAUX. ON CONSTATE ALORS QUE LA STRUCTURE MOLECULAIRE GOUVERNE LES DEUX PREMIERES ETAPES D'IONISATION MAIS SEMBLE PEU INFLUENTE LORS DES DERNIERES ETAPES. NOS RESULTATS S'INTERPRETENT A PARTIR DE L'HYPOTHESE D'UNE SEQUENCE D'IONISATION MULTIPLE A DES DISTANCES INTERNUCLEAIRES CROISSANTES. CE SONT ALORS LES ETATS DOUBLEMENT CHARGES QUI INITIALISENT LA REACTION EN SE DISSOCIANT PENDANT L'APPLICATION DE L'IMPULSION LASER. LA THEORIE DE L'IONISATION PAR CHAMP DONNE UNE ESTIMATION DES DISTANCES INTERNUCLEAIRES D'IONISATION ET DES ECLAIREMENTS D'APPARITION DES VOIES DISSOCIATIVES OBSERVEES

Author:
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Category : Vacuum
Languages : en
Pages : 880

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Author: George C. Schatz
Publisher: Courier Corporation
ISBN: 0486136728
Category : Science
Languages : en
Pages : 386

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Advanced graduate-level text looks at symmetry, rotations, and angular momentum addition; occupation number representations; and scattering theory. Uses concepts to develop basic theories of chemical reaction rates. Problems and answers.

Author: Claude Cohen-Tannoudji
Publisher: John Wiley & Sons
ISBN: 3527345558
Category : Science
Languages : en
Pages : 790

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This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.

Author: Alan Siddons
Publisher: Stairway Press
ISBN: 0982773404
Category : Science
Languages : en
Pages : 364

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Compelling, easy-to-read, and written by internationally recognized experts in applied science, this volume destroys the human-caused global warming theory and clears the innocent carbon dioxide molecule of all the heinous crimes it is accused of.